Method of producing sintered ceramic body

Details Method of producing sintered ceramic body Method of producing sintered ceramic body

1992-07-10

1993-10-05

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264344, C04B 3564

Patent

active

052502449

ABSTRACT:
A method of producing a sintered body by molding a mixture of a ceramic base powder, a sintering assistant powder and an organic binder and sintering the molded body in a non-oxidizing atmosphere is disclosed in which the ceramic base powder has such a particle size distribution that the amount of powder particles not greater than 1.0 .mu.m in size is not more than 15% by weight and the average particle diameter is not greater than 5 .mu.m. According to the method, therefore, sufficient passage of gas is secured in a degreasing step, resulting in an enhanced degreasing efficiency and exellent sintering properties. Where the sintering assistant powder has such a particle size distribution that the amount of powder particles not greater than 10 .mu.m in size is not more than 5% by weight, the amount of coarse powder is extremely small and, therefore, large voids are not formed. It is thus possible to produce easily a high-quality sintered body by controlling the respective particle size distributions of the powders.

REFERENCES:
patent: 4080414 (1978-03-01), Anderson
patent: 4126653 (1978-11-01), Smith
patent: 4135938 (1979-01-01), Murata
patent: 4154787 (1979-05-01), Brown
patent: 4671912 (1987-06-01), Komatsu
patent: 4701427 (1987-10-01), Boecker
patent: 4818455 (1989-04-01), Huseby
patent: 5089194 (1992-02-01), Hoffmann

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